S-90002A105 1/4"-20 x 1 1/4" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification
High-Strength Steel Hex Head Screws with Material Certification
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh environmental conditions
- Optimized installation efficiency with external hex drive design providing secure tool engagement and torque transmission
- Enhanced thread reliability through Class 2A thread fit ensuring consistent engagement and vibration resistance
- Maximum material hardness at Rockwell C33 for excellent wear resistance and long-term durability
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
- Versatile coarse threading with UNC 1/4"-20 pattern facilitating quick assembly in various materials
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions where failure is not an option. The high-strength steel construction combined with Rockwell C33 hardness provides exceptional resistance to shear forces and permanent deformation in heavy machinery, structural frameworks, and industrial equipment. The zinc yellow-chromate plating creates a protective barrier against corrosion in demanding environments, from manufacturing facilities to outdoor construction sites. With fully threaded UNC coarse design and Class 2A thread fit, these fasteners ensure secure connections that withstand vibration and dynamic loads while maintaining precise dimensional accuracy throughout their service life.
Specification Summary & Compliance
This 1/4"-20 x 1-1/4" hex head screw features Class 2A thread fit tolerance per UNC standards, ensuring precise dimensional control for consistent performance. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 8 specifications, guaranteeing material quality and mechanical properties. The fastener meets industry standards for heavy-duty applications with 150,000 psi tensile strength and Rockwell C33 hardness, while the zinc yellow-chromate plating provides corrosion protection in accordance with standard industrial finishing requirements.
